Novel inner support sling

Abstract

This utility model discloses a novel internal support lifting device, which extends the lifting rod into the interior of a connector cylinder. The outer wall of the connector cylinder has several through slots, and a support block is provided for each slot. A support cone surface on the lifting rod engages with a support ramp surface on the support block. When the two surfaces are pressed together, the support block expands outward from the connector cylinder. A trigger element is fixed at the bottom of the lifting rod. The trigger element has a trigger protrusion I, a trigger protrusion II, and a limiting wheel. The limiting wheel has several functional teeth, some of which have clearance areas to allow the trigger protrusion II to move vertically. When the lifting rod falls, trigger protrusion I contacts the limiting wheel, aligning the clearance area with trigger protrusion II. Force can then be applied to the support block by the lifting rod to achieve expansion. When the lifting rod falls again, trigger protrusion I contacts the limiting wheel, locking the functional teeth with trigger protrusion II. The lifting rod cannot apply force to the support block, and the entire novel internal support lifting device can be detached from the load.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a novel internal support lifting device. Background Technology

[0002] The new type of internal support lifting tool is a special tool used for lifting and transferring finished roll materials in industries such as papermaking, metal processing (such as steel rolling), film production, tape master rolls, paper rolls, small hole steel parts, and nylon parts.

[0003] There are several types of existing new internal support lifting devices, among which the more commonly used ones are: 1. Mechanical strut type lifting tools, which use internal mechanical structures (such as connecting rods, inclined planes, screws) to drive external claws or blocks to extend radially, supporting the inner wall of the roll material to achieve lifting. This type of lifting tool does not rely on an external power source and has high reliability.

[0004] 2. C-hook: This type of tool uses a C-shaped steel hook to directly catch the outer circumference of the coil material from the bottom for lifting. This tool is simple in structure, low in cost, and durable. However, it can easily damage the surface of the coil material, as the C-hook makes hard contact with the surface, which can easily crush or scratch the material.

[0005] The aforementioned new type of internal support lifting tool always requires human assistance during use. In other words, personnel need to insert this type of lifting tool into the central through hole of the roll material, lift it, and then pull it out of the lifting tool. It cannot achieve automatic lifting and automatic release.

[0006] In view of the technical drawbacks of the above-mentioned technical solutions, as people skilled in the art, there is an urgent need to design a new type of internal support lifting device that can be structurally improved to enable insertion and extraction of rolled materials without external assistance, and to achieve rapid locking and release. Utility Model Content

[0007] To overcome the shortcomings of existing technology, this utility model provides a novel internal support lifting device, which adopts a rod-shaped structure and uses a mechanical structure to realize the compression control of the expansion component, thereby enabling the novel internal support lifting device to quickly expand and loosen inside the mother roll.

[0008] The technical solution adopted by this utility model to solve its technical problem is: A novel internal support lifting device includes a plug-in cylinder and a lifting rod; the lifting rod extends into the interior of the plug-in cylinder, and a lifting part is provided at the top of the lifting rod; a top cover is provided at the top of the plug-in cylinder. The outer wall of the plug-in tube is provided with several through slots, and an expansion block is provided for each through slot. The outer side of the expansion block is provided with an anti-detachment protrusion. The rod is provided with an expansion cone surface, and the inner side of the expansion block is provided with an expansion slope surface that cooperates with the expansion cone surface. When the two are pressed together, the expansion block expands to the outside of the plug-in tube. A trigger is fixed at the bottom of the boom, and the trigger is provided with trigger protrusion I and trigger protrusion II; a limit wheel is provided between trigger protrusion I and trigger protrusion II, and the limit wheel is provided with several functional teeth, wherein some of the functional teeth are provided with avoidance areas for avoidance when trigger protrusion II moves vertically.

[0009] The triggering element is a triggering cylinder, and the limiting wheel is fixed to the outer wall of the insertion cylinder by a fixed shaft. A gear clearance groove is provided on the side wall of the triggering cylinder; the gear clearance groove enables the triggering cylinder to make clearance when moving vertically.

[0010] The clearance zones on the functional teeth of the limiting wheel are spaced out and evenly distributed.

[0011] The limiting wheel is equipped with damping components on both its front and rear sides, which provide rotational resistance to the limiting wheel and ensure that it does not rotate when not under stress.

[0012] The expansion block is provided with a limiting edge, which blocks the inside of the insertion cylinder and prevents the expansion block from coming out of the through groove area.

[0013] The beneficial effects of this utility model after adopting the above structure are described as follows: This utility model extends the boom into the interior of the plug-in cylinder. The outer wall of the plug-in cylinder is provided with several through slots, and a support block is provided for each through slot. The boom is provided with a support cone surface that cooperates with the support inclined surface provided on the inner side of the support block. When the two are pressed together, the support block expands outward to the plug-in cylinder. A trigger is fixed at the bottom of the boom. The trigger is provided with a trigger protrusion I and a trigger protrusion II, and a limit wheel is provided between the trigger protrusion I and the trigger protrusion II. The limit wheel is provided with several functional teeth, and some of the functional teeth are provided with a clearance area for clearance when the trigger protrusion II moves vertically. During hoisting operations, the boom is connected to external hoisting equipment. When the boom descends, trigger protrusion I contacts the limit wheel, aligning the clearance area with trigger protrusion II. This allows for smooth vertical movement of the boom, enabling force to be applied to the expansion block, ultimately expanding the load. When the boom descends again, trigger protrusion I contacts the limit wheel, locking the functional teeth with trigger protrusion II. At this point, the boom cannot move vertically, cannot apply force to the expansion block, and the expansion block will not compress the external load. The entire novel internal support lifting device can then detach from the load. This invention employs a mechanical structure to achieve expansion during mother roll hoisting and detachment of the hoisting tool from the mother roll, completing the entire process automatically without manual assistance. It overcomes the shortcomings of existing technologies and is an ideal new type of internal support lifting device. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present utility model; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of this utility model (in the hoisting state). Figure 4 This is a schematic diagram of the internal structure of the present invention (triggered state). Figure 5 This is a schematic diagram of the internal structure of this utility model (in the detached state). Figure 6 This is a schematic diagram of the limiting wheel fixing structure; In the attached diagram: 1. Insertion cylinder; 11. Fixed shaft; 12. Through groove; 2. Expansion block; 21. Anti-detachment protrusion; 22. Expansion inclined surface; 23. Vertical side; 24. Positioning platform; 25. Limiting side; 3. Top cover; 4. Lifting rod; 40. Lifting ring; 41. Expansion conical surface; 5. Trigger cylinder; 51. Gear clearance groove; 52. Trigger protrusion I; 53. Trigger protrusion II; 6. Limiting wheel; 61. Functional tooth; 62. Clearance area; 7. Damping spring. Detailed Implementation

[0015] The present invention will be described in detail below through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. However, it should be noted that the specific embodiments described below do not limit the technical solution. Those skilled in the art can make further technical extensions under the guidance of the following technical solutions. The scope of protection of this patent application is determined by the claims.

[0016] Example 1: A novel internal support lifting device, such as Figure 1 , 2 As shown in Figure 3, it includes a plug-in tube 1, a lifting rod 4, and a top cover 3; the lifting rod 4 extends into the interior of the plug-in tube 1, and a lifting part is provided at the top of the lifting rod 4. In this embodiment, a lifting ring 40 is welded and used as the lifting part. Those skilled in the art can also expand the lifting hole and other components.

[0017] The outer wall of the plug-in cylinder 1 is provided with several through slots 12. In this embodiment, four through slots 12 are evenly distributed, and an expansion block 2 is provided for each through slot 12. The outer surface of the expansion block 2 is provided with an anti-detachment protrusion 21. To further improve the stability during hoisting, the anti-detachment protrusion 21 is preferably designed as an anti-detachment structure with a top plane and a lower sloping surface. The lifting rod 4 is provided with two umbrella-shaped expansion cone surfaces 41, and all expansion cone surfaces are located inside the plug-in cylinder 1. The inner surface of the expansion block 2 is connected with an expansion slope 22, a vertical edge 23, and a positioning platform 24. The expansion slope 22, the vertical edge 23, and the positioning platform 24 form a group that cooperates with a single expansion cone surface 41. In this embodiment, the two umbrella-shaped expansion cone surfaces 41 correspond to the upper and lower groups, respectively. When the expansion cone surface 41 and the expansion slope 22 are pressed together, the expansion block 2 expands outward from the plug-in cylinder 1. The bottom end of the expansion block 4 is also provided with a limiting edge 25, which blocks the inside of the insertion cylinder 1 to prevent the expansion block 4 from coming out of the through groove 12 area when it is squeezed by the expansion cone surface 41.

[0018] The key design feature of this utility model is that a trigger element is fixed at the bottom of the boom 4. In this embodiment, the trigger element is a circular trigger cylinder 5. The inner wall of the trigger cylinder 5 is provided with trigger protrusion I 52 and trigger protrusion II 53. A limiting wheel 6 is provided between the trigger protrusion I 52 and trigger protrusion II 53. The limiting wheel 6 is fixed to the outer wall of the insertion cylinder 1 by a fixed shaft 11. A gear avoidance groove 51 is provided on the side wall of the trigger cylinder 5. The gear avoidance groove 51 enables the trigger cylinder 5 to avoid the limiting wheel 6 when moving vertically.

[0019] The limiting wheel 6 is provided with a ring of functional teeth 61. In this embodiment, there are nine functional teeth 61. Every two functional teeth 61 are spaced apart, and a clearance area 62 is provided on the third functional tooth. That is, among the nine functional teeth 61, three functional teeth are provided with clearance areas 62, and six functional teeth are full teeth. The clearance areas 62 on the three functional teeth 61 are spaced apart and evenly distributed. The clearance area 62 can be understood as cutting off part of the functional teeth 61 by removing material. The clearance area 62 is used to avoid the vertical movement of the protrusion II 53.

[0020] Example 2: This utility model has several working states during use, as follows: Lifting status: When using the lifting equipment, the lifting ring 40 on the lifting boom 4 is connected to the external lifting equipment, which is a forklift, overhead crane, crane or other machinery that can perform vertical lifting.

[0021] When the boom 4 is lowered, it is inserted into the center hole of the mother roll. The mother roll mentioned here is a tape mother roll. This equipment can also be used for products or goods with center holes, such as paper rolls, perforated steel parts, and nylon parts.

[0022] When the insertion reaches the top cover 3 at the top of the connector 1, the connector 1 stops, and the lifting rod 4 continues to move downward under its own weight. Figure 3 As shown, the trigger protrusion I 52 inside the trigger cylinder 5 touches the limit wheel 6 to align the avoidance area 62 with the trigger protrusion II 53. At this time, the boom 4 can move smoothly vertically. By applying external vertical upward force, the boom 4 moves upward as a whole under force. The expansion cone surface 41 on the boom applies force to the expansion block 2, and the expansion block 2 expands outward to expand the support of the hoisted object.

[0023] Non-lifting state (disengaged state): When the external drive boom 4 falls again, as... Figure 4 As shown, when the trigger protrusion I 52 contacts the limit wheel 6, the functional tooth 61 and the trigger protrusion II 53 are about to lock into place. At this time, when the boom 4 is subjected to vertical force again, as... Figure 5 As shown, the boom 4 is secured by two adjacent functional teeth 61, preventing it from moving upwards to apply force to the expansion block 2. The expansion block 2 will not squeeze the external load, and the entire new type of internal support lifting device can be directly removed from the load.

[0024] When the trigger protrusion I52 is set as described above, its falling limit is just touching the functional tooth 61 on the right side of the limit wheel 6, so as to... Figure 4 The falling state is the extreme position.

[0025] Furthermore, this utility model provides damping springs 7 on both the front and rear sides of the limiting wheel 6. The damping springs 7 on both sides provide rotational resistance to the limiting wheel 6, ensuring that the limiting wheel 6 does not rotate when not under force.

[0026] This utility model uses a mechanical structure to achieve the expansion and disengagement of the hoisting tools from the mother roll during hoisting. The entire process is completed automatically without manual assistance, which overcomes the shortcomings of the existing technology and is an ideal new type of internal support hoisting tool.

Claims

1. A novel internal support lifting device, characterized in that: It includes a plug-in tube and a lifting rod; the lifting rod extends into the interior of the plug-in tube, and a lifting part is provided at the top of the lifting rod; a top cover is provided at the top of the plug-in tube; The outer wall of the plug-in tube is provided with several through slots, and an expansion block is provided for each through slot. The outer side of the expansion block is provided with an anti-detachment protrusion. The rod is provided with an expansion cone surface, and the inner side of the expansion block is provided with an expansion slope surface that cooperates with the expansion cone surface. When the two are pressed together, the expansion block expands to the outside of the plug-in tube. A trigger is fixed at the bottom of the boom, and the trigger is provided with trigger protrusion I and trigger protrusion II; a limit wheel is provided between trigger protrusion I and trigger protrusion II, and the limit wheel is provided with several functional teeth, wherein some of the functional teeth are provided with avoidance areas for avoidance when trigger protrusion II moves vertically.

2. The novel internal support lifting device as described in claim 1, characterized in that: The triggering element is a trigger cylinder, and the limiting wheel is fixed to the outer wall of the insertion cylinder by a fixed shaft. A gear clearance groove is provided on the side wall of the trigger cylinder.

3. The novel internal support lifting device as described in claim 1, characterized in that: The clearance zones on the functional teeth of the limiting wheel are spaced out and evenly distributed.

4. The novel internal support lifting device as described in claim 1, characterized in that: The limiting wheel is provided with damping components on both the front and rear sides, which provide rotational resistance to the limiting wheel.

5. The novel internal support lifting device as described in claim 1, characterized in that: The expansion block is provided with a limiting edge, which is used to block the inside of the insertion cylinder.

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